5道英语题目,麻烦各位

What does your brother___ at Tsing Hua University？
A.majors in
B.majors
C.major in
D.major
应选C。 major in sth，主修……。又如：She majored in maths and physics (at university). 她（在大学）主修数学和物理.不可错选D，因为what做major in的宾语。而不能说major what。

Quite a lot of children get together in the park____June 1st to celebrate Children's Day.
A.on
B.from
C.at
D.by
应选A。在某日要用on。
My grandpa is now still___at the age of 98
A.alive B.aliving C.loved D.lived
应选A。alive 活着的，精神饱满的。在这里是“精神饱满”的意思。

How long have you___the motorbike?
A.bought B.had C.borrowed D.lent
应选B。how long是表示一段时间，应该与延续性动词连用，其他三个动词都是瞬间动词。
Susan,why are you still here?
I am sorry,but I___when to meet.
A.don't tell
B.didn't tell
C.haven't told
D.wasn't told
应选D。tell是一个及物动词，后面必须有宾语。如果选了另外三项就都没有宾语了。 而D项里，用了被动语态，意思是说：对不起，但是没有人告诉我什么时间集会啊。

CAABD

我只帮你回答第1道题C